Rotary sleevy valve for internatlcombusation engines



-March 5, 1946. G. DAvlEs 2,35991 ROTARY SLEEVE VALVE FOR INTERNAL-COMBUSTION NGN-S Filed June 19, l1944 v 2 Sheets-Sheet 1l March 5',146. l GJDAVIES 2,395,994,

ROTARY SLEEVE VALVE FOR INTERNAL-COMBUSTION ENGINES Fiied Jung 19,1944 2 sheets-sheet 2 lW//X////`/////////// ////////1 /v E y -fnvenlar Patented Mar. 5, 1946 A i;

ROTARY SLEEVE vALvE rolt INTERNAL-f coMBUs'rIoNrNGINEs Guy Davies, Kemp's'ton, England" "f Application June 19, 1944, Serial No. 540,935 In Great Britain August 25, 1943 (c1. 12s-soi 4 Claims.

This invention relates to rotary sleeve valves for internal combustion engines of the kind wherein a cylindrical sleeve is arranged t rotate between the cylinder wall and the Working piston of the engine. Y y

According to one aspect of the invention the end of the` rotary sleeve valve normallyadjacent to the cylinder head is arranged to form ahousing for a slidable member having at least one passage extending therethrough communicating with the combustion space of the engine and adapted to register with inlet and exhaust ports in the engine cylinder as the sleeve rotates,v the slidable member being urged to engage the cylinder Wall by spring means and its inner face being subjected .to the pressure prevailing in the engine cylinder. According to another aspect ofthe invention the end of the sleeve valve normally adjacent to the cylinder head has a cavity,

forming a housing for a slidable member having atleast one passage extending therethrough y communicating With the combustion space of the engine and adapted to register with the inlet and exhaust ports in the engine cylinder as the sleeve rotates, the outer face of the slidable member being adapted to engage the cylinder wall and the inner face being subjected to Athe pressure prevailing in the engine cylinder.

To enable the invention to be fully understood it will now be described With reference to the accompanying drawings, in which:

Fig. 1 is a sectional elevation of an engine 'cylinder with a rotary sleeve valve according to one embodiment of the invention,

Fig. 2 is a side elevation of the cylinder, part of the wall being broken away to expose the slidable member in the rotary sleeve,

Fig. 3 is'a section on line 3-3 of Fig. 2.

Figure 4 isa vertical section taken on a different section line from Figure 1 and shows the valve 5 opposite a blank portion of the cylinder and not opposite the port 9, this Figure 4 also showing the connecting rod and crankshaft.

As shown in the accompanying drawings a cylindrical sleeve l is arranged between the piston 2 and cylinder 3 of an internal combustion engine. 'Ihe piston 2V has a. connecting rod 2a connected with the crankshaft a. The endV of the sleeve adjacent to the cylinder head comprises a solid portion 4 which is recessed to form a housing fora substantially cylindrical slidable piston likev member 5 which is urged into engagementwith the inner wall of the cylinder 3 by springs 6 which are arranged in pockets 1 in the solid portion 4 of the sleeve. The member 5 is formed with a passage 8 extending therethrough of W section and the cylinder 3 is formed with inlet and outlet ports 9, I0 of similar section connected respectively with conduits not shewn for supplying a combustible mixture and exhausting the burnt gases. A screwthreaded sparking plug aperture II is also provided. Piston rings I2 arearranged in the member 5 to ensure a gas-tight fit. Y

The sleeve I has a stem 32 carrying a gear Wheel 33 meshing with a gear Wheel 34 on a tower shaft 35. A bevel pinion 36 is mounted on the lower end of the shaft35, and is rotated by a bevel pinion 31 on the crankshaft a. VWhen the valve I is rotated by this gearing, the slidable member 5 is moved over wall 3 and regisright angles to the axis of the sleeve I, it may be mounted at an angle to the said axis.

According to the present invention the sleeve and slidable member have a purely rotary motion imparted to them, and further the slidable v member is urged by a spring into engagement with the cylinder and has its inner face exposed to the pressure prevailing in the cylinder, whereby it is forced against the cylinder by gas pressure on the compression and power strokes of the piston.

The portion 4 of the sleeve housing the slidable member 5 may have chamber 38 adapted to be supplied with oil for cooling Ipurposes.

I claim:

1. A rotary sleeve valve of the kind referred to wherein the end of the sleeve normally adjacent to the cylinder head is arranged to form a housing fora slidable member having at least one passage extending therethrough communieating with the combustion space of the engine and adapted to register with inlet and exhaust ports in the engine cylinder as the sleeve rotates,

vwherein. the sleeve comprises a cylindrical porthe slidable member being urged to engage the cylinder wall by spring means and its inner face being subjected to the pressure prevailing in the engine cylinder.

2. A rotary sleeve valve according to claim 1 Y tion arranged between the piston and cylinder 3. A rotary sleeve valve of the kind referred to wherein the end of the sleeve normally adjacent to the cylinder head has a cavity forming a housing for a slidable member having at least one passage extending therethrough communi- 5 eating with the combustion space of the engine and adapted to register With the inlet and exhaust ports in the engine cylinder as the sleeve rotates; the outer face of the slidable member being adapted to engage the cylinder wall and the inner face being subjected to the pressure prevailing in the engine cylinder.

4. A rotary sleeve valve of the kind referred to wherein the end of the sleeve normally adjacent to the cylinder head has a cavity forming a housing for a substantially cylindrical piston-like member slidable in a path substantially at right angles to the axis of the sleeve, and having at least one passage extending therethrough cornmunicating with the combustion space of the engine and adapted to register with inlet and exhaust ports in the engine cylinder as the sleeve rotates, the outer face of the piston-like member being adapted to engage the cylinder Wall and the inner face being subjected to the pressure prevailing in the engine cylinder.

GUY DAVIES. 

